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C. B. YAW.

DRIVING MECHANISM. APPLICATION FILED MN. 22. 1914.

' 1,195,547, Patented Aug. 22, 1916.

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u J WITNESSES:

%%zzz @J HIEATTURNEY one .13. YAW, or ARLINGTON, NEW

JERSEY, ASSIGNOR TO REMINGTON TYPFiWRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

- DRIVING MECHANISM.

Specification of Letters Patent.

Application filed January 22, 1914. Serial No. 813,673.

ton, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Driving Mechanism, of which the following is a specification.

My invention relates to devices for transmitting power.

The principal object of myinvention is to provide means for driving a piece of mechanism alternatively from either one-of two sources of power, and to do this without the necessity for any adjustment or special at-.

tention on the part of the person having charge of the mechanism. 7 1

Another object is to provide means whereby two power shafts are so related to a part to be driven as that either of said shafts, if

set into operation, will become automatically.

coupled to said part, the shaft not in operation being automatically uncoupled.

A further object is to provide means whereby a piece of mechanism can be run by either direct or alternating electric current, whichever may happen to be available, without any other adjustment or attention on the part of the operator than to connect up the electric circuit with the appropriate one of two motors. r

Another object is to provide improved means for automatically operating a typewriting machine, which means is likely to be moved about from one locality to another and where different sorts ofpower may be available in the different p aces.

To the above and other ends which will hereinafter appear, 'my invention consists in certain features of construction, and combinations and arrangements of parts, all of which will be fully set forth herein and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a rear elevation, partly in section and with parts broken away, of one embodiment of my invention. Figs. 2 and 3 are side views on a larger scale than Fig. 1 and show ing, in different positions in the two views, the selective coupling mechanism constituting one of the elements of my invention, one of the motor shaftsbeing shown in section in each 0? said views. Fig. 4 is a section taken through the axis of the power shafts and through the mechanism shown in Figs,

2 and 3 and on the same scale as said Figs. 2 and 3. I i

The specific instance chosen for the purpose of illustrating my. invention, will also illustrate very well one of the purposes of it.

A typewrlting machine is set upon a piece of mechanism whereby said typewriter is automatically operated at a high rate of speed. This machine is intended as a window display in stores where typewriters are sold. These machines are sent from one typewriter salesroom to another, these rooms belng s tuated'ln diiferent towns and cities.

The machines are driven by electric motors and In some places the current available 1s direct current and in other places an alternating current is to be had, so that a direct current motor has to be used in some stores and an alternating-current motor in others, and this has led to a good deal of trouble and inconvenience. By my invention I mount in the niachine'twomotors, one a direct current and the other an alternating current motor, and provide mechanism whereby, if either of these motors is started, it will drive the machine, leaving the other motor entirely disconnected. In this way, when the machine is received at any given store, all that-is required of the persons who wish to exhibit it there is to connect up the right motor with the. electric light circuit and the machine will operate satisfactorily.

The typewriter 1, stands on the casing 9 tains mechanism, not shown, for automatically operating the typewriter. Said mechanism is driven by a sprocket chain running over a sprocket wheel 22, which sprocket wheel 22 is driven by either one of two electric motors 23 and 24, one of which may be an alternating current motorand the other a direct current motor. It will of course be understood that any other two alternative sources of power would be the equivalents of these motors in my construction. As here shown the motors 23 and 24: are suspended from a frame comprising fore and aft bars 25 and cross bars 26, by means of screws 27 said frame being itself supported in the casing of the operating machine.

The motors have any suitable means for connecting thereto the wires from the electric light circuits, the means here shown consiStingeimply of binding posts 30 on the Patented Aug. 22, rare. I

' motor 23 and binding posts 31 on.- the as shown.

motor 24.

The armature shafts 32 and 33, the former pertaining'to themotor 23 and the latter to the motor 24, constitute power shafts and they are arranged co-axially end to end, as shown in Fig. 4, the extreme ends of the shafts being in the present instance reduced The sprocket wheel 22 constitutes part of a structure that is mounted on the ends of these two shafts, said structure, as shown in the present instance being so mounted by means of ball bearings 34, and

- tured and sold in assembled form ready to said ball bearings as shown inthe present instance being of the sort that are manufacbe inserted into mechanism of this character. Thestructure of which the sprocket wheel 22 constitutes a part can be variously constructed, but as here showndt comprises a hub- 35 of an internal diameter greater than that of the reduced ends of the shafts 32 and 33 and counterbored at both ends to fit the casings of the ball bearings 34, one

' therefore toward'the motor 24. At the left of the sprocket wheel insaid Fig. 4 there is a washer 40 and at the left of that a plate or washer 41 having an arm projecting there from in which ,is mounted a wrist pin 42 projecting toward the left in Fig. 4, or toward the motor 23. For the sake of symmetry I have shown these two wrist pins as on diametrically opposite sides of the hub structure. The various parts mounted, on

the hub 35 are connected together and secured to said hub by means of two screws 43, which pass clear through from right to left of said parts and also through the flange 36,

said screws bein threaded into the left-hand plate 41. It Wlll of course be understood that all of these details of construction can be modified without departing from my invention. I

On each of the shafts 32, 33, just to the left and right respectively of the sprocket wheel and its associated devices, there is mounted a disk or wheel 44 having a hub 45 which is rigidly secured on the shaft by means of a set screw 46. To the face of the flat part of said wheel there ispivoted on a pivot screw 47 a dog or couplingmember 48 having a suitably formed shoulder 50 adapted to engage one of the wrist pins 38,

I and at the other end to the pin 52 :42, as shownin Fig. 3. The dog or coupler 48 is, however, normally held 1n the;

position shown in Fig. 2 by mea s of .a 4

spring 51 connected at one end to s id dog project'- ing from the wheel 44. In said position shown: in Fig. 2 the dog :48 is drawn by said spring down against the hub 45 and so that the shoulder 50 is out of the path of the Wrist pin 38 or 42. When the shaft is set into motion in the direction of the arrow in Fig. 3, the dog is thrown outward by centrifugal force'so as to engage its wrist. pin and couple said shaft to the sprocket wheel 22. The outward motion of the dog, due to centrifugal force, is limited by means of a stop screw 53 which is adapted to be engagedby the hook-shaped part 54 of said dog, as shown in Fig. 3. .The head" of said screw preferably overlies the edge of said dog at a point where the outline of said edge is concentric with the pivot screw 47. The screw thusserves not only as a stop for the dog but also as a guide. g

It will be perceived that the two dogs both normally occupy the inner position shown in Fig 2 where neither of them is in the path of movement of its cotiperating wrist-pin 38 or 42. If either shaft is set into motion, however, by starting a motor, then as soon as the motor has acquired a little speed the dog 48 on the shaft of that particular motor is thrown outward bycentrifugal force so as to engage the wrist pin and turn the sprocket wheel. The other dog being mounted 'on the shaft of a motor that. is not running, remains out of the path of its wrist pin'which revolves around it without noise or other interference from said dog. If one of the dogs should stick or if for any other reason its spring should prove unequal to the task of pulling it to its inner position,

then as soon as the other motor was started and the wrist pins were set in motion, the wrist pm of said dog would strike against to its inner position, after which the mechanlsm would run silently and as if the shaft :of the idle motor were merely a fixed bearing for one end of the hub 35. When one of the motors is in operation the hub turns with that motor shaft and the other motor shaft becomes a fixed bearing on which that end of the hub rotates.

- It-will be observed that if either one of the motors is set into operation and the other is out of operation, the motor that is in operation. will be automatically coupled up as has just been described, the other remaining stationary and being uncoupled; but if the second motor be also started soIthat both motors are running at once, both dogs will be thrown. to operative position and both motors will be automatically coupled up to the wheel 22 to drive the same. The devices a the inclined edge 55 of said dog'andforce'it described are therefore not only adapted for an alternative use of the two sources of power but, in addition, for the use of both.

No claim is made herein for the typewriter operating .mechanism nor for the combination thereof with the driving mechanism herein claimed, such claims being reserved for a separate application.

Various changes can be made in the details of construction and arrangement without departing from my invention.

\Vhat I claim as new and desire to secure said wrist pins to couple said shaft to said wheel. l

2. The combination of two power shafts arranged end-to-end, a wheel having wrist pins connected therewith, centrifugal coupling devices on said shafts, each of said coupling devices being adapted when its shaft is in motion to cooperate with one of said wrist pins to couple said shaft to said wheel and the other wrist pin being adapted on occasion to move the other coupling device to inoperative position.

The combination of two power shafts arranged end-to-end, a wheel mounted on said two shafts, two dogs one pivoted on each of saidshafts and each adapted when its shaft is rotated to be moved outward by centrifugal force and each having a spring which normally holds it in an inner position, and projections on said wheel for engagement by said dogs.

4. The combination of two power shafts arranged end-to-end, a wheel mounted on the adjacent ends of said shafts, and centrifugal coupling devices mounted on said shafts and each adapted when its shaft is set in motion automatically to couple that shaft to said wheel, and each of said devices being adapted automatically to disconnect its shaft from the wheel when said shaft is at rest.

5. The combination of two power shafts arranged end-to-end, a wheel mounted on the adjacent ends of said shafts, centrifugal dogs mounted on said shafts, and means connected with said wheel and adapted to cooperate with said dogs to automatically couple to said wheel whichever one of said power shafts is set in motion and to force to inoperative position the dog of the other power shaft.

6. The combination of a power shaft, a

part to be turned, said part having a wrist pin, and a spring-returned centrifugal dog mounted on said power shaft and arranged when said shaft is in operation to move out ward to'position to engage said wrist pin and when said shaft is at rest to be automatically disconnected from said wrist pin.

7. The combination of a power shaft, a part to be driven, said part having a wrist pin, means for automatically coupling said shaft with said part when said shaft is set in operation, and'means whereby in case said part is set in motion by other means while the shaft is at rest, said wrist pin can force said coupling means to uncouplingposition.

8. The combination of two power shafts arranged end to end, a Wheel Whose hub is journaled on said two power shafts by ball bearings, one connecting said hub with each of said shafts, and means on each shaft to automatically couple said shaft to said wheel when said shaft is set in motion and for uncoupling said shaft when the shaft is at rest.

Signed at the borough of Manhattan, city of New York, in the county of New York,

\ Witnesses.

E. M. WELLS, CHARLES E. SMITH. 

